Good aim / good connection
Weapon doesn't matter, hitting your target does.
none of them
well for me its a mp7 but you can choose any weapon that you like
The RPG 7,or the Javelin
There is no one best gun, but the one with the largest explosion is the RPG if you are looking for something like that
modern warfare is the best, why would you want to ?
Huh? Modern Warfare 2 is a game, not a category.
In my opinion, the best weapon in MW3 is the ACR 6.8 because of its high damage, fire rate, and accuracy. Second best would be the Mk14 because it is a single shot and has basically full damage, accuracy, and range.
the best map for xbox live on the game modern warfare 2 is either favela or rust.
Assault rifles: m16 or famas or scarh Sniper Rifles: Barrette and WA2000(use stopping power and silencer with WA2000)
well.... i use the famas, tar21 acr, and ak47. the famas is a 3 round burst but it kills your enemy in two or three shots.
Spartan Jay.
One of the best secondary weapons in CoDMW2 is the 1887 shotgun. I recommend attaching akimbo to this for multiple damage. You must be quite a high level to unlock this weapon. Also it is good if you have FMJ and akinbo if you have bling pro unlocked!